A simple technique is described for extrapolating the 1 kc values of certain two-terminal capacitors to higher frequencies without incurring serious losses in accuracy.The method is intended for use with air capacitors having binding post or banana plug t Topics: Shortwave radio., Radio measurements., Calibration.
A common test procedure for measuring ferrimagnetic resonance linewidth, Delta H, and gyromagnetic ratio, gamma, of microwave ferrites is based upon a perturbation analysis of the complex frequency shift obtained when a small sample is placed in a resonan Topic: Radio--Tables.
There has been some interest shown recently in the practical significance of the antipodal focussing in VLF propagation. If the earth and the ionosphere were perfectly concentric spherical surfaces, theory indicates that the amplitude of the field should Topic: Radio waves.
Using the exact series solution for diffraction by a perfectly conducting wedge, numerical results are presented for the structure of the field in the apex region. This provides insight to the nature of electomagnetic fields near a surface discontinuity. Topic: Radio waves.
Geographic and frequency dependent distributions of atmospheric noise *power enumerated in CCIR Report 322 (1964) are approximated by series expansions for use in electronic computers.Coefficients of Fourier series representation of worldwide geographic d Topic: Radio noise.
The radio refractive index can be measured either directly or indirectly. The former method is utilized by radio frequency refractometers; the latter method involves measurement of temperature, pressure and humidity and conversion to refractive index. I Topics: Radio meteorology., Refractive index--Measurement., Radio waves.
Numerical values of the path integrals for the first five hops are given as a function of distance from 1000 km to 8000 km, for frequencies of 10, 20, 30, 60, 100, 150, and 200 kHz., for sea paths, and for land paths with conductivities of 0 * .01 and 0.0 Topics: Radio measurements., Geometrical optics., Radio frequency.
The results of VHF ionospheric scatter measurements made in the European-Mediterranean area are shown to be in good agreement with results obtained in continental United States.Sporadic-E propagation was observed much more frequently in the EuropeanMedite Topic: Ionospheric radio wave propagation.
The table of attenuation error as a function of vane-angle error gives the error in decibels caused by vane misalinement which is common in the rotary vane attenuator.The attenuation errors corresponding to vane-angle errors ranging from zero to 0.499 deg Topics: Wave guides., Radio--Tables.
The volume is a collection of diagrams, tables, and text material, which has been assembled to show the interrelationships between various radio frequency measurements made by the Institute for Basic Standards (IBS).In particular, the measurements are tho Topic: Radio frequency--Measurement.